The Exchange of Energy, Water and Carbon Dioxide between Wet Arctic Tundra and the Atmosphere at the Lena River Delta, Northern Siberia
The ecosystem-scale exchange fluxes of energy, water and carbon dioxide (CO2) between wet arctic tundra and the atmosphere were investigated by the micrometeorological eddy covariance method. The investigation site was situated in the centre of the Lena River Delta in Northern Siberia (72°22'N,...
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Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky
2006
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Online Access: | http://nbn-resolving.de/urn:nbn:de:gbv:18-31777 https://ediss.sub.uni-hamburg.de/handle/ediss/1607 |
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ftsubhamburg:oai:ediss.sub.uni-hamburg.de:ediss/1607 2023-05-15T14:59:07+02:00 The Exchange of Energy, Water and Carbon Dioxide between Wet Arctic Tundra and the Atmosphere at the Lena River Delta, Northern Siberia Der Austausch von Energie, Wasser und Kohlendioxid zwischen arktischer Feuchtgebietstundra und der Atmosphäre im nordsibirischen Lena-Delta Kutzbach, Lars Pfeiffer, Eva-Maria (Prof. Dr.) 2006-01-01 http://nbn-resolving.de/urn:nbn:de:gbv:18-31777 https://ediss.sub.uni-hamburg.de/handle/ediss/1607 eng eng Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky Kutzbach, Lars (2006): Berichte zur Polar- und Meeresforschung, 541. Alfred-Wegener-Institut für Polar- und Meeresforschung, Am Handelshafen 12, D-27570 Bremerhaven, Deutschland. ISSN 1618-3193, 157 S. http://nbn-resolving.de/urn:nbn:de:gbv:18-31777 https://ediss.sub.uni-hamburg.de/handle/ediss/1607 http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess No license Eddy-Kovarianz-Methode Klimaveränderung carbon cycle energy balance tundra carbon budget water budget micrometeorology wetlands Northern Siberia Arctic 550 Geowissenschaften 38.81 Atmosphäre 38.99 Geowissenschaften: Sonstiges Kohlenstoffkreislauf Kohlenstoffhaushalt Wasserhaushalt Energiebilanz Mikrometeorologie Feuchtgebiet Sibirien <Nord> Arktis ddc:550 doctoralThesis doc-type:doctoralThesis 2006 ftsubhamburg 2023-02-19T23:09:31Z The ecosystem-scale exchange fluxes of energy, water and carbon dioxide (CO2) between wet arctic tundra and the atmosphere were investigated by the micrometeorological eddy covariance method. The investigation site was situated in the centre of the Lena River Delta in Northern Siberia (72°22'N, 126°30'E). The micrometeorological campaigns were performed from July to October 2003 and from May to July 2004. The combined datasets of the two campaigns were used to characterise the seasonal course of the energy, water and CO2 fluxes and the underlying processes for the synthetic measurement period May 28…October 21 2004/2003 which included the period of snow and soil thawing as well as the beginning of refreezing. The cumulative summer (June…August) energy partitioning was characterised by low net radiation (607 MJ m-2), large ground heat flux (163 MJ m-2), low latent heat flux (250 MJ m-2) and very low sensible heat flux (157 MJ m-2) compared to other tundra sites. These findings point out the major importance of the very cold permafrost (due to extreme winter cooling) for the summer energy budget of the tundra in Northern Siberia. Despite a high cumulative precipitation of 201 mm during summer, the cumulative summer evapotranspiration of 98 mm was low compared to other tundra sites. In summer 2003, heavy rainfall initiated severe thermoerosion phenomena and in the consequence increased drainage and run-off at the wet polygonal tundra thus demonstrating the sensitivity of permafrost landscapes to degradation by changes in hydrology. The CO2 budget of the wet polygonal tundra was characterised by a low intensity of the main CO2 exchange processes, namely the gross photosynthesis and the ecosystem respiration. The gross photosynthesis accumulated to -432 g m-2 over the photosynthetically active period (June…September). The ecosystem respiration accumulated to +327 g m-2 over the photosynthetically active period, which corresponds to 76 % of the magnitude of the gross photosynthesis. The wet polygonal tundra of the ... Doctoral or Postdoctoral Thesis Arctic Arktis Arktis* Berichte zur Polar- und Meeresforschung lena delta lena river permafrost Tundra Siberia ediss.sub.hamburg (Staats- und Universitätsbibliothek Hamburg, Carl von Ossietzky) Arctic |
institution |
Open Polar |
collection |
ediss.sub.hamburg (Staats- und Universitätsbibliothek Hamburg, Carl von Ossietzky) |
op_collection_id |
ftsubhamburg |
language |
English |
topic |
Eddy-Kovarianz-Methode Klimaveränderung carbon cycle energy balance tundra carbon budget water budget micrometeorology wetlands Northern Siberia Arctic 550 Geowissenschaften 38.81 Atmosphäre 38.99 Geowissenschaften: Sonstiges Kohlenstoffkreislauf Kohlenstoffhaushalt Wasserhaushalt Energiebilanz Mikrometeorologie Feuchtgebiet Sibirien <Nord> Arktis ddc:550 |
spellingShingle |
Eddy-Kovarianz-Methode Klimaveränderung carbon cycle energy balance tundra carbon budget water budget micrometeorology wetlands Northern Siberia Arctic 550 Geowissenschaften 38.81 Atmosphäre 38.99 Geowissenschaften: Sonstiges Kohlenstoffkreislauf Kohlenstoffhaushalt Wasserhaushalt Energiebilanz Mikrometeorologie Feuchtgebiet Sibirien <Nord> Arktis ddc:550 Kutzbach, Lars The Exchange of Energy, Water and Carbon Dioxide between Wet Arctic Tundra and the Atmosphere at the Lena River Delta, Northern Siberia |
topic_facet |
Eddy-Kovarianz-Methode Klimaveränderung carbon cycle energy balance tundra carbon budget water budget micrometeorology wetlands Northern Siberia Arctic 550 Geowissenschaften 38.81 Atmosphäre 38.99 Geowissenschaften: Sonstiges Kohlenstoffkreislauf Kohlenstoffhaushalt Wasserhaushalt Energiebilanz Mikrometeorologie Feuchtgebiet Sibirien <Nord> Arktis ddc:550 |
description |
The ecosystem-scale exchange fluxes of energy, water and carbon dioxide (CO2) between wet arctic tundra and the atmosphere were investigated by the micrometeorological eddy covariance method. The investigation site was situated in the centre of the Lena River Delta in Northern Siberia (72°22'N, 126°30'E). The micrometeorological campaigns were performed from July to October 2003 and from May to July 2004. The combined datasets of the two campaigns were used to characterise the seasonal course of the energy, water and CO2 fluxes and the underlying processes for the synthetic measurement period May 28…October 21 2004/2003 which included the period of snow and soil thawing as well as the beginning of refreezing. The cumulative summer (June…August) energy partitioning was characterised by low net radiation (607 MJ m-2), large ground heat flux (163 MJ m-2), low latent heat flux (250 MJ m-2) and very low sensible heat flux (157 MJ m-2) compared to other tundra sites. These findings point out the major importance of the very cold permafrost (due to extreme winter cooling) for the summer energy budget of the tundra in Northern Siberia. Despite a high cumulative precipitation of 201 mm during summer, the cumulative summer evapotranspiration of 98 mm was low compared to other tundra sites. In summer 2003, heavy rainfall initiated severe thermoerosion phenomena and in the consequence increased drainage and run-off at the wet polygonal tundra thus demonstrating the sensitivity of permafrost landscapes to degradation by changes in hydrology. The CO2 budget of the wet polygonal tundra was characterised by a low intensity of the main CO2 exchange processes, namely the gross photosynthesis and the ecosystem respiration. The gross photosynthesis accumulated to -432 g m-2 over the photosynthetically active period (June…September). The ecosystem respiration accumulated to +327 g m-2 over the photosynthetically active period, which corresponds to 76 % of the magnitude of the gross photosynthesis. The wet polygonal tundra of the ... |
author2 |
Pfeiffer, Eva-Maria (Prof. Dr.) |
format |
Doctoral or Postdoctoral Thesis |
author |
Kutzbach, Lars |
author_facet |
Kutzbach, Lars |
author_sort |
Kutzbach, Lars |
title |
The Exchange of Energy, Water and Carbon Dioxide between Wet Arctic Tundra and the Atmosphere at the Lena River Delta, Northern Siberia |
title_short |
The Exchange of Energy, Water and Carbon Dioxide between Wet Arctic Tundra and the Atmosphere at the Lena River Delta, Northern Siberia |
title_full |
The Exchange of Energy, Water and Carbon Dioxide between Wet Arctic Tundra and the Atmosphere at the Lena River Delta, Northern Siberia |
title_fullStr |
The Exchange of Energy, Water and Carbon Dioxide between Wet Arctic Tundra and the Atmosphere at the Lena River Delta, Northern Siberia |
title_full_unstemmed |
The Exchange of Energy, Water and Carbon Dioxide between Wet Arctic Tundra and the Atmosphere at the Lena River Delta, Northern Siberia |
title_sort |
exchange of energy, water and carbon dioxide between wet arctic tundra and the atmosphere at the lena river delta, northern siberia |
publisher |
Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky |
publishDate |
2006 |
url |
http://nbn-resolving.de/urn:nbn:de:gbv:18-31777 https://ediss.sub.uni-hamburg.de/handle/ediss/1607 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arktis Arktis* Berichte zur Polar- und Meeresforschung lena delta lena river permafrost Tundra Siberia |
genre_facet |
Arctic Arktis Arktis* Berichte zur Polar- und Meeresforschung lena delta lena river permafrost Tundra Siberia |
op_relation |
Kutzbach, Lars (2006): Berichte zur Polar- und Meeresforschung, 541. Alfred-Wegener-Institut für Polar- und Meeresforschung, Am Handelshafen 12, D-27570 Bremerhaven, Deutschland. ISSN 1618-3193, 157 S. http://nbn-resolving.de/urn:nbn:de:gbv:18-31777 https://ediss.sub.uni-hamburg.de/handle/ediss/1607 |
op_rights |
http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess No license |
_version_ |
1766331257219710976 |